If you're using a knot, yes. Personally I use double loop strings with my sidenocks, so both nocks are cut at the same angle. I've got no experience using a knot with them, so couldn't say.
You might find the nocks end up quite different to how you imagine them. It's hard to get a true perspective using photos, and experimentation is often the only way to fill in the gaps. Start exaggerated and you might be closer than you think - make them extra large, extra rounded, extra curved and so on.